STAINLESS STEEL HEXAGON THIN NUTS ISO 4035

Hexagon Thin Nuts ISO 4035 — ISO 4035 is the international standard for the hexagon thin nut, filling the same reduced-height, jam-nut role as the older DIN 439 and DIN 936 standards it has largely superseded on new drawings, while sharing the full-height ISO 4032 nut's thread geometry scaled down to a lower body. As with any thin nut, the reduced stack height means less thread engagement than a full nut of the same diameter, so it isn't intended as a primary load-bearing fastener — it's specified as a locknut run down against a full nut, as a spacer on threaded rod, or wherever axial clearance genuinely won't accommodate a full-height nut, rather than as the main fastener carrying the joint's load. Practically, there's no dimensional advantage to choosing ISO 4035 over DIN 439 for a new design; the deciding factor is almost always which standard the project's drawings or specifications call up by number, with ISO numbering increasingly the default on international or EU-facing work while DIN references remain common in UK general engineering and on legacy equipment. Where a design references an older DIN 439 or DIN 936 part and needs replacing, ISO 4035 is generally a suitable substitute for non-critical applications, though critical or safety-related replacements should have their dimensions checked against the specific original standard rather than assumed interchangeable. On its own, a thin nut has no locking feature and behaves like any plain nut relying on friction and torque; reliable locking performance comes from jamming it against a full nut or another feature, not from the thin nut itself. A2 stainless suits general jam-nut duty; A4 is worth the modest extra cost for marine, washdown, or continuously outdoor applications, since the nut's own load is usually secondary to the corrosion-resistance question over its service life. Sizing follows the mating bolt or stud's diameter and pitch, with coarse pitch as the default unless the design specifically calls for fine thread.

Related products: Hexagon Full Nuts ISO 4032, Fine Pitch Hexagon Thin Nuts ISO 8675, Hexagon Thin Nuts DIN 936, Nylon Insert Nuts

FAQs
Is ISO 4035 dimensionally identical to DIN 439?
Close enough for general non-critical use that the two are commonly treated as interchangeable, though for a precision or safety-critical replacement, checking chamfer and crown height against the original specification is worth doing before assuming a match.

Which standard should a new drawing reference, ISO 4035 or DIN 439?
Either is a valid, widely stocked choice; ISO numbering is increasingly the default on international or EU-facing specifications, while DIN references remain extremely common in UK general engineering, so the decision often comes down to house convention rather than technical necessity.

What are ISO 4035 nuts used for?
They are used as locknuts against a full nut, spacers on threaded rod, and in assemblies where a low-profile nut is needed but is not the primary load-bearing fastener.

Is ISO 4035 self-locking on its own?
No, it relies on standard friction and torque and is typically jammed against a full nut to achieve reliable locking performance.